Ice bathtub



FIG. 1 is a left side, top perspective view of an ice bathtub, showing my new design;

FIG. 2 is a right side, bottom perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is aright side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken lines in the figures illustrate portions of the ice bathtub that form no part of the claimed design. 

CLAIM The ornamental design for an ice bathtub, as shown and described. 